AR-F12 (serv.man8). Maintenance, inspection and troubleshooting - Sharp Copying Equipment Service Manual (repair manual). Page 49

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CHAPTER 8   TROUBLESHOOTING
7.
Faulty paper pushing plate motor (related to PI15S)
8.
Faulty paper pushing plate motor (related to PI1S)
Checks
Check the paper pushing
plate top position sensor. Is
the sensor normal?
Does the paper pushing
plate motor operate at a
specific timing?
Replace the paper pushing
plate motor. Is the problem
corrected?
Cause
Paper pushing top
position sensor (PI15S)
Saddle stitch controller
PCB
Paper pushing plate
motor (M8S)
Saddle stitch controller
PCB
Step
1
2
3
Yes/No
No
Yes
No
Yes
No
Action
Replace the sensor.
Replace the saddle
stitch controller PCB.
Check the paper
pushing plate drive
mechanism. If a fault
is found, correct it.
Otherwise, go to step
3.
End.
Replace the saddle
stitch controller PCB.
Checks
Check the paper pushing
plate motor clock sensor. Is
the sensor normal?
Does the paper pushing
plate motor operate at a
specific timing?
Replace the paper pushing
plate motor. Is the problem
corrected?
Cause
Paper pushing plate
motor clock sensor
(PI1S)
Saddle stitch controller
PCB
Paper pushing plate
motor (M8S)
Saddle stitch controller
PCB
Step
1
2
Yes/No
No
Yes
No
Yes
No
Action
Replace the sensor.
Replace the saddle
stitch controller PCB.
Check the paper
pushing plate drive
mechanism. If a fault
is found, correct it.
Otherwise, go to step
3.
End.
Replace the saddle
stitch controller PCB.
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